diff --git a/api/ovdashboard_api/config.py b/api/ovdashboard_api/config.py
index c072eaf..db40bd5 100644
--- a/api/ovdashboard_api/config.py
+++ b/api/ovdashboard_api/config.py
@@ -10,21 +10,25 @@ from tomli import loads as toml_loads
 from tomli_w import dump as toml_dump
 from webdav3.exceptions import RemoteResourceNotFound
 
+from ovdashboard_api.dav_common import caldav_list
+
 from .dav_file import DavFile
 
 
 class TickerConfig(BaseModel):
     """
-    Sections "[ticker.*]" in "config.txt".
+    Section "[ticker]" in "config.txt".
     """
 
     separator: str = " +++ "
     comment_marker: str = "#"
+    color: str = "primary"
+    speed: int = 30
 
 
 class ImageConfig(BaseModel):
     """
-    Sections "[image.*]" in "config.txt".
+    Sections "[image*]" in "config.txt".
     """
 
     mode: str = "RGB"
@@ -34,6 +38,15 @@ class ImageConfig(BaseModel):
     }
 
 
+class AggregateCalendarConfig(BaseModel):
+    """
+    Sections "[[aggregate]]" in "config.txt".
+    """
+
+    name: str = "All Events"
+    calendars: list[str]
+
+
 class Config(BaseModel):
     """
     Main representation of "config.txt".
@@ -41,6 +54,7 @@ class Config(BaseModel):
 
     ticker: TickerConfig = TickerConfig()
     image: ImageConfig = ImageConfig()
+    aggregate: list[AggregateCalendarConfig] = []
 
     @classmethod
     async def get(cls) -> "Config":
@@ -56,10 +70,14 @@ class Config(BaseModel):
             )
 
         except RemoteResourceNotFound:
-            buffer = BytesIO()
-            toml_dump(cls().dict(), buffer)
-            buffer.seek(0)
+            cfg = cls()
+            cfg.aggregate.append(
+                AggregateCalendarConfig(calendars=await caldav_list()),
+            )
 
+            buffer = BytesIO()
+            toml_dump(cfg.dict(), buffer)
+            buffer.seek(0)
             await dav_file.dump(buffer.read())
 
-        return cls()
+            return cfg
diff --git a/api/ovdashboard_api/dav_common.py b/api/ovdashboard_api/dav_common.py
index edfa14e..bcac62c 100644
--- a/api/ovdashboard_api/dav_common.py
+++ b/api/ovdashboard_api/dav_common.py
@@ -3,7 +3,7 @@ Definition of WebDAV and CalDAV clients.
 """
 
 from functools import lru_cache
-from typing import Any
+from typing import Any, Iterator
 
 from caldav import DAVClient as CalDAVclient
 from caldav import Principal as CalDAVPrincipal
@@ -55,3 +55,15 @@ def caldav_principal() -> CalDAVPrincipal:
     """
 
     return _CALDAV_CLIENT.principal()
+
+
+@run_in_executor
+def caldav_list() -> Iterator[str]:
+    """
+    Asynchroneously lists all calendars using the main WebDAV client.
+    """
+
+    return (
+        cal.name
+        for cal in caldav_principal().calendars()
+    )
diff --git a/api/ovdashboard_api/routers/_common.py b/api/ovdashboard_api/routers/_common.py
index 2b5f4ed..8c210d3 100644
--- a/api/ovdashboard_api/routers/_common.py
+++ b/api/ovdashboard_api/routers/_common.py
@@ -9,7 +9,7 @@ from typing import Iterator, Protocol
 from fastapi import HTTPException, status
 from webdav3.exceptions import RemoteResourceNotFound
 
-from ..dav_common import caldav_principal, webdav_list
+from ..dav_common import caldav_list, webdav_list
 
 
 @dataclass(frozen=True)
@@ -71,10 +71,7 @@ class CalendarNameLister:
     """
 
     async def __call__(self) -> Iterator[str]:
-        return (
-            cal.name
-            for cal in caldav_principal().calendars()
-        )
+        return await caldav_list()
 
 
 @dataclass(frozen=True)